unless the other guy quite literally doesn't have experience/knowledge of a tick, I think one can figure out a way to describe it :-)
north: although ptolemy introduced the convention of north/up, I can easily see how the use of a lodestone could naturally give rise to the custom (north --> lodestone points forward; when you tilt the surface perpendicular to the ground, it is up).
north: although ptolemy introduced the convention of north/up, I can easily see how the use of a lodestone could naturally give rise to the custom (north --> lodestone points forward; when you tilt the surface perpendicular to the ground, it is up).